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Diffstat (limited to 'include/clang/AST/RecordLayout.h')
| -rw-r--r-- | include/clang/AST/RecordLayout.h | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/include/clang/AST/RecordLayout.h b/include/clang/AST/RecordLayout.h deleted file mode 100644 index 667f235..0000000 --- a/include/clang/AST/RecordLayout.h +++ /dev/null @@ -1,315 +0,0 @@ -//===--- RecordLayout.h - Layout information for a struct/union -*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file defines the RecordLayout interface. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_CLANG_AST_RECORDLAYOUT_H -#define LLVM_CLANG_AST_RECORDLAYOUT_H - -#include "clang/AST/CharUnits.h" -#include "clang/AST/DeclCXX.h" -#include "llvm/ADT/DenseMap.h" - -namespace clang { - class ASTContext; - class FieldDecl; - class RecordDecl; - class CXXRecordDecl; - -/// ASTRecordLayout - -/// This class contains layout information for one RecordDecl, -/// which is a struct/union/class. The decl represented must be a definition, -/// not a forward declaration. -/// This class is also used to contain layout information for one -/// ObjCInterfaceDecl. FIXME - Find appropriate name. -/// These objects are managed by ASTContext. -class ASTRecordLayout { -public: - struct VBaseInfo { - /// The offset to this virtual base in the complete-object layout - /// of this class. - CharUnits VBaseOffset; - - private: - /// Whether this virtual base requires a vtordisp field in the - /// Microsoft ABI. These fields are required for certain operations - /// in constructors and destructors. - bool HasVtorDisp; - - public: - bool hasVtorDisp() const { return HasVtorDisp; } - - VBaseInfo() : HasVtorDisp(false) {} - - VBaseInfo(CharUnits VBaseOffset, bool hasVtorDisp) : - VBaseOffset(VBaseOffset), HasVtorDisp(hasVtorDisp) {} - }; - - typedef llvm::DenseMap<const CXXRecordDecl *, VBaseInfo> - VBaseOffsetsMapTy; - -private: - /// Size - Size of record in characters. - CharUnits Size; - - /// DataSize - Size of record in characters without tail padding. - CharUnits DataSize; - - // Alignment - Alignment of record in characters. - CharUnits Alignment; - - /// RequiredAlignment - The required alignment of the object. In the MS-ABI - /// the __declspec(align()) trumps #pramga pack and must always be obeyed. - CharUnits RequiredAlignment; - - /// FieldOffsets - Array of field offsets in bits. - uint64_t *FieldOffsets; - - // FieldCount - Number of fields. - unsigned FieldCount; - - /// CXXRecordLayoutInfo - Contains C++ specific layout information. - struct CXXRecordLayoutInfo { - /// NonVirtualSize - The non-virtual size (in chars) of an object, which is - /// the size of the object without virtual bases. - CharUnits NonVirtualSize; - - /// NonVirtualAlignment - The non-virtual alignment (in chars) of an object, - /// which is the alignment of the object without virtual bases. - CharUnits NonVirtualAlignment; - - /// SizeOfLargestEmptySubobject - The size of the largest empty subobject - /// (either a base or a member). Will be zero if the class doesn't contain - /// any empty subobjects. - CharUnits SizeOfLargestEmptySubobject; - - /// VBPtrOffset - Virtual base table offset (Microsoft-only). - CharUnits VBPtrOffset; - - /// HasOwnVFPtr - Does this class provide a virtual function table - /// (vtable in Itanium, vftbl in Microsoft) that is independent from - /// its base classes? - bool HasOwnVFPtr : 1; - - /// HasVFPtr - Does this class have a vftable that could be extended by - /// a derived class. The class may have inherited this pointer from - /// a primary base class. - bool HasExtendableVFPtr : 1; - - /// HasZeroSizedSubObject - True if this class contains a zero sized member - /// or base or a base with a zero sized member or base. Only used for - /// MS-ABI. - bool HasZeroSizedSubObject : 1; - - /// \brief True if this class is zero sized or first base is zero sized or - /// has this property. Only used for MS-ABI. - bool LeadsWithZeroSizedBase : 1; - - /// PrimaryBase - The primary base info for this record. - llvm::PointerIntPair<const CXXRecordDecl *, 1, bool> PrimaryBase; - - /// BaseSharingVBPtr - The base we share vbptr with. - const CXXRecordDecl *BaseSharingVBPtr; - - /// FIXME: This should really use a SmallPtrMap, once we have one in LLVM :) - typedef llvm::DenseMap<const CXXRecordDecl *, CharUnits> BaseOffsetsMapTy; - - /// BaseOffsets - Contains a map from base classes to their offset. - BaseOffsetsMapTy BaseOffsets; - - /// VBaseOffsets - Contains a map from vbase classes to their offset. - VBaseOffsetsMapTy VBaseOffsets; - }; - - /// CXXInfo - If the record layout is for a C++ record, this will have - /// C++ specific information about the record. - CXXRecordLayoutInfo *CXXInfo; - - friend class ASTContext; - - ASTRecordLayout(const ASTContext &Ctx, CharUnits size, CharUnits alignment, - CharUnits requiredAlignment, - CharUnits datasize, const uint64_t *fieldoffsets, - unsigned fieldcount); - - // Constructor for C++ records. - typedef CXXRecordLayoutInfo::BaseOffsetsMapTy BaseOffsetsMapTy; - ASTRecordLayout(const ASTContext &Ctx, - CharUnits size, CharUnits alignment, - CharUnits requiredAlignment, - bool hasOwnVFPtr, bool hasExtendableVFPtr, - CharUnits vbptroffset, - CharUnits datasize, - const uint64_t *fieldoffsets, unsigned fieldcount, - CharUnits nonvirtualsize, CharUnits nonvirtualalignment, - CharUnits SizeOfLargestEmptySubobject, - const CXXRecordDecl *PrimaryBase, - bool IsPrimaryBaseVirtual, - const CXXRecordDecl *BaseSharingVBPtr, - bool HasZeroSizedSubObject, - bool LeadsWithZeroSizedBase, - const BaseOffsetsMapTy& BaseOffsets, - const VBaseOffsetsMapTy& VBaseOffsets); - - ~ASTRecordLayout() = default; - - void Destroy(ASTContext &Ctx); - - ASTRecordLayout(const ASTRecordLayout &) = delete; - void operator=(const ASTRecordLayout &) = delete; -public: - - /// getAlignment - Get the record alignment in characters. - CharUnits getAlignment() const { return Alignment; } - - /// getSize - Get the record size in characters. - CharUnits getSize() const { return Size; } - - /// getFieldCount - Get the number of fields in the layout. - unsigned getFieldCount() const { return FieldCount; } - - /// getFieldOffset - Get the offset of the given field index, in - /// bits. - uint64_t getFieldOffset(unsigned FieldNo) const { - assert (FieldNo < FieldCount && "Invalid Field No"); - return FieldOffsets[FieldNo]; - } - - /// getDataSize() - Get the record data size, which is the record size - /// without tail padding, in characters. - CharUnits getDataSize() const { - return DataSize; - } - - /// getNonVirtualSize - Get the non-virtual size (in chars) of an object, - /// which is the size of the object without virtual bases. - CharUnits getNonVirtualSize() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - - return CXXInfo->NonVirtualSize; - } - - /// getNonVirtualSize - Get the non-virtual alignment (in chars) of an object, - /// which is the alignment of the object without virtual bases. - CharUnits getNonVirtualAlignment() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - - return CXXInfo->NonVirtualAlignment; - } - - /// getPrimaryBase - Get the primary base for this record. - const CXXRecordDecl *getPrimaryBase() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - - return CXXInfo->PrimaryBase.getPointer(); - } - - /// isPrimaryBaseVirtual - Get whether the primary base for this record - /// is virtual or not. - bool isPrimaryBaseVirtual() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - - return CXXInfo->PrimaryBase.getInt(); - } - - /// getBaseClassOffset - Get the offset, in chars, for the given base class. - CharUnits getBaseClassOffset(const CXXRecordDecl *Base) const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - assert(CXXInfo->BaseOffsets.count(Base) && "Did not find base!"); - - return CXXInfo->BaseOffsets[Base]; - } - - /// getVBaseClassOffset - Get the offset, in chars, for the given base class. - CharUnits getVBaseClassOffset(const CXXRecordDecl *VBase) const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - assert(CXXInfo->VBaseOffsets.count(VBase) && "Did not find base!"); - - return CXXInfo->VBaseOffsets[VBase].VBaseOffset; - } - - CharUnits getSizeOfLargestEmptySubobject() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return CXXInfo->SizeOfLargestEmptySubobject; - } - - /// hasOwnVFPtr - Does this class provide its own virtual-function - /// table pointer, rather than inheriting one from a primary base - /// class? If so, it is at offset zero. - /// - /// This implies that the ABI has no primary base class, meaning - /// that it has no base classes that are suitable under the conditions - /// of the ABI. - bool hasOwnVFPtr() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return CXXInfo->HasOwnVFPtr; - } - - /// hasVFPtr - Does this class have a virtual function table pointer - /// that can be extended by a derived class? This is synonymous with - /// this class having a VFPtr at offset zero. - bool hasExtendableVFPtr() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return CXXInfo->HasExtendableVFPtr; - } - - /// hasOwnVBPtr - Does this class provide its own virtual-base - /// table pointer, rather than inheriting one from a primary base - /// class? - /// - /// This implies that the ABI has no primary base class, meaning - /// that it has no base classes that are suitable under the conditions - /// of the ABI. - bool hasOwnVBPtr() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return hasVBPtr() && !CXXInfo->BaseSharingVBPtr; - } - - /// hasVBPtr - Does this class have a virtual function table pointer. - bool hasVBPtr() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return !CXXInfo->VBPtrOffset.isNegative(); - } - - CharUnits getRequiredAlignment() const { - return RequiredAlignment; - } - - bool hasZeroSizedSubObject() const { - return CXXInfo && CXXInfo->HasZeroSizedSubObject; - } - - bool leadsWithZeroSizedBase() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return CXXInfo->LeadsWithZeroSizedBase; - } - - /// getVBPtrOffset - Get the offset for virtual base table pointer. - /// This is only meaningful with the Microsoft ABI. - CharUnits getVBPtrOffset() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return CXXInfo->VBPtrOffset; - } - - const CXXRecordDecl *getBaseSharingVBPtr() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return CXXInfo->BaseSharingVBPtr; - } - - const VBaseOffsetsMapTy &getVBaseOffsetsMap() const { - assert(CXXInfo && "Record layout does not have C++ specific info!"); - return CXXInfo->VBaseOffsets; - } -}; - -} // end namespace clang - -#endif |
